Name: Period:
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Transcript of Name: Period:
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Name:Period:
Dr. Kelly
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Periosteum
Compact bone
Osteon
Blood vessels
Spongy bone
Osteocytes(Encased osteoblasts)
Bone matrix(Calcium Phosphate)
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Compact Bone
Compact bone consists of repeating units called osteons. Each osteon has concentric layers of the mineralized matrix deposited around a central canal. The canal contains blood vessels and nerves that serve the bone cells. Bone-forming cells, called osteoblasts, deposit the matrix around the central canal and ultimately surround themselves with the mineralized material, forming a pocket called a lacuna. Once osteoblasts are surrounded by matrix, the cells are called osteocytes. Narrow connections called canaliculi extend from lacunae and connect osteocytes to each other and to the central canal.
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Compact Bone
Compact bone is made up of concentric layers of bone matrix surrounding central canals (CC). A canal and its associated layers make up an osteon. Osteocytes are located within cavities called lacunae.
cc
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Osteocytes
Osteocytes (OC) are connected by cellular extensions called canaliculi. These extensions allow nutrients to pass from cell to cell.
oc